What range of sizes does small-diameter hose (SDH) typically encompass?

Answer: B — 1 inch to 2 inches

Small-diameter hose (SDH) typically encompasses a range of sizes from 1 inch to 2 inches. This designation is important in firefighting and emergency response, as SDH is utilized for various operational needs, including fire suppression in areas where larger hoses would be cumbersome or impractical. The 1 inch to 2 inches range allows for a balance between maneuverability and the ability to deliver sufficient water flow for effective firefighting. Smaller hoses can also be easier to handle, making them more accessible for quick deployment in tight spaces. Using hoses outside this range, such as those below 1 inch, may not provide adequate flow rates for firefighting, while hoses above 2 inches are typically classified as large diameter hoses (LDH), which serve different operational purposes. Thus, the choice of 1 inch to 2 inches correctly identifies the standard size range of small-diameter hoses.